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Views:7 Media playback is unsupported on your device Media captionThe man approached police in Buffalo before being pushed backwards Two US policemen have been charged with second-degree assault after they were filmed pushing a 75-year old protester to the ground, seriously injuring him. Aaron Torgalski, 39, and Robert McCabe, 32, pleaded not...

Views:7 Media playback is unsupported on your device Media captionThe man approached police in Buffalo before being pushed backwards An entire tactical unit of a US police department has quit after two officers accused of brutality were sent on unpaid leave, reports local media. In a video that went viral on Thursday,...